<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<?php
echo ticketprijs(2,3);
?>
<br/>
<?php
echo ticketprijs(2);
function ticketprijs($volwassenen, $kinderen = 0){
return $volwassenen * 20 + $kinderen * 10;
}
?>
</body>
</html>
Made by Thijs Aarnoudse